The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2004
Filed:
Dec. 06, 2002
Yuusai Ishitobi, Fukushima-ken, JP;
Naoto Yamamoto, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A data transfer unit is provided which reliably receives the expedited command when the expedited command has arrived, and changes over the reception to receiving a general purpose command when no expedited command is arriving. The data transfer unit contains a data module having at least a command module, and first and second interfaces and first and second host control units. An expedited command output at an indefinite period from the first host control unit is fed to the data module through the first interface. The first interface is turned off and the second interface is turned on at all times when a general purpose command output at a predetermined period from the second host control unit is fed to the command module through the second interface. The first interface is turned on and the second interface is turned off by interface change-over signals of an active level fed to the data module just before the first host control unit produces the expedited command.